1 files changed, 4 insertions, 1 deletions
diff --git a/proc.h b/proc.h
index 86ba0eb..b9ec246 100644
--- a/proc.h
+++ b/proc.h
@@ -33,11 +33,14 @@ struct jmpbuf {
   int jb_eip;
 };
 
+enum proc_state { UNUSED, EMBRYO, WAITING, RUNNABLE, RUNNING, ZOMBIE };
+
 struct proc{
   char *mem; // start of process's physical memory
   unsigned sz; // total size of mem, including kernel stack
   char *kstack; // kernel stack, separate from mem so it doesn't move
-  enum { UNUSED, RUNNABLE, WAITING, ZOMBIE, RUNNING } state;
+  enum proc_state state;
+  enum proc_state newstate; // desired state after swtch()
   int pid;
   int ppid;
   void *chan; // sleep